Ushio Denki Kabushiki Kaisha

Kabushiki Kaisha Topcon

Other

Yoshio Okazaki

Yasufumi Fukuma

Takumi Sato

Kiyoyuki Kabuki

Toru Noda

Yoshihiro Horikawa

Masayuki Hideshima

Akihiko Sugitani

Mitsuo Narita

Toru Suzuki

Hidetaka Aeba

Akio Morimoto

Masachika Ooyama

Akio Sakurai

Masaru Sato

Yasuo Kato

Yukiharu Tagawa

Yoshihisa Yokokawa

Yoshihiro Kanahashi

Mikio Shimizu

Koji Nishio

Koji Enomoto

Toshiya Ukai

Kazuhiko Onuma

Norihiro Sengoku

Ai Okazaki

Disclosed are a light irradiation apparatus that prevents or suppresses projection of light on adjoining other portions and can be miniaturized overall, and a photocurable material treatment apparatus that includes this light irradiation apparatus. The light irradiation apparatus includes: a light source having a plurality of light emitting elements arranged in the x direction; and an elongated cylindrical lens extending in the x direction along the light source unit. A light source reference plane that includes a center of a light emission surface of each light emitting element is located on a plane separated in the y direction from a lens reference plane that includes a center axis of the cylindrical lens. A direction of the light from the cylindrical lens is tilted in a direction away from the light source reference plane with respect to the lens reference plane

Light irradiation apparatus including a light shield

In a light source device, in each division of an image frame, two or more of the color lights X, Y and Z (e.g., red, green and blue) can be projected simultaneously. Each of the color lights X, Y and Z is divided into two in terms of time so that synthesized light of one group of division color lights enters a first spatial modulation element. Synthesized light of another group of division color lights enters a second spatial modulation element, whereby gradation of each color light in each of the first and second spatial modulation elements is controlled.

Light source device

The present invention provides a discharge lamp apparatus including a high pressure discharge lamp, a concave reflection mirror, and a laser light source. An electrical discharge space is within the high pressure discharge lamp. A pair of electrodes faces each other in the electrical discharge space. A concave reflection mirror surrounds the high pressure discharge lamp. A laser light source emits laser light of a red wavelength band, wherein the laser light passes through the electrical discharge space.

Discharge lamp apparatus including a high pressure discharge lamp, a concave reflection mirror, and a laser light source

An optical device includes a high pressure discharge lamp, a concave condensing mirror placed so as to surround the high pressure discharge lamp while an optical axis stays extended along a direction of an arc of the high pressure discharge lamp, and an aspherical lens that is placed forward the light exit direction of the concave condensing mirror and that is rotationally symmetrical with respect to the optical axis of the concave condensing mirror, in which a reflecting surface of the concave condensing mirror is configured so as to have a shape set in connection with the shape of a light incident surface and the shape of a light exit surface of the aspherical lens.

Optical device

In a light source device, that obtains high light usage efficiency by projecting simultaneously two or more of three primary color lights X, Y and Z. Moreover, each color light X, Y and Z is divided into two in terms of time so that p-wave and s-wave linear polarization lights are formed, such that the synthesized light of the p-wave linear polarization lights enters a first spatial modulation element and the synthesized light of the s-wave linear polarization lights enters a second spatial modulation element to permit gradation control of each color light.

It is an object of the present invention to provide a light source apparatus capable of reducing the production cost and increasing productivity. A light source apparatus comprises an approximately spherical discharge container, sealing portions continuously formed from both ends of the discharge container respectively, and a concave reflection mirror disposed so as to surround the discharge lamp, wherein the concave reflection mirror has a spheroidal surface or paraboloid of revolution formed from a front opening edge thereof, a sealing portion receiving section is formed at a head section of the concave reflection mirror and has a flat inner bottom surface, in which an end of one of the sealing portions is received, and an end surface of an end portion of the one of the sealing portions and the inner bottom surface of the sealing portion receiving section are brought into contact.

Light source apparatus with sealing portion receiving section

A reflector according to the present invention can certainly reflect light emitted from a lamp in a desired direction without producing distortion in a reflection surface by specifying the distance between a projection portion and a back side end portion of the reflection surface of a reflector to be in the optimal range. The reflector, having a front side opening portion, a back side opening portion and a reflection surface, the reflector comprises a projection portion provided in an inner surface of the reflector, wherein, the projection portion is formed in an area at a 2.5 mm or more distance from a back side end portion of the reflection surface toward a back side.

Reflector and light source apparatus having reflector

An observation apparatus is provided. An apex angle of a contact prism is inputted by operating an apex angle setting knob of a control panel. A fining angle of the contact prism is inputted by operating a fitting angle setting knob. A control unit determines the amount of correction for astigmatism of a left observation optical system and the amount of correction for astigmatism of a right observation optical system based on a recognized observation magnification and the inputted apex angle. An axial angle for the astigmatism of the left observation optical system and an axial angle for the astigmatism of the right observation optical system are determined based on the inputted fitting angle. Variable cross cylinder lens rotating drive units are controlled to rotate cylinder lenses of each of the right and left observation optical systems, thereby obtaining the determined axial angle and the determined amount of correction.

Observation apparatus

An eye fundus photographing system, wherein a three-dimensional moving picture is photographed and displayed in eye fundus of infrared fluorescent photographing. The photographing system includes an exciter filter for transmitting a specific wavelength region of the illumination light emitted from the light source, an illumination optical system for irradiating the fundus with the illumination light transmitted from the exciter filter, left and right objective lenses for extracting the infrared fluorescent light emitted by an ICG of the eye fundus as a left and right photographing light, a photographing optical system including a barrier filter for transmitting the predetermined infrared wavelength region of the left and right photographic light, infrared TV cameras for photographing this wavelength region with a predetermined frame rate, a synchronizing cable for synchronizing each frame and a displayed three-dimensional moving image obtained by combining a left and right photographic image by the infrared TV camera.

Eye fundus photographing system

A lamp unit ( ) for use with digital micromirror devices has a direct current short arc discharge lamp ( ) in which at least 0.15 mg/mm of mercury is sealed. A short focal length, elliptical reflector mirror ( ) both covers the discharge lamp ( ) and positions the axis of radiation roughly in line with the long axis of the discharge lamp, such that the short arc discharge lamp ( ) is placed with the cathode ( ) in a front opening of the reflector mirror ( )

Light unit with improved heat dissipation

A reflector discharge lamp in which a concave reflector has a front cover and in which a foil seal arrangement of hermetically sealed portions of a discharge lamp mounted therein can be advantageously prevented from reaching a high temperature. This is achieved by the discharge lamp being arranged such that a longitudinal axis of the discharge lamp coincides with the optical axis of the concave reflector by the end area of one of the hermetically sealed portions of the discharge lamp being located in an area of the concave reflector which is opposite the front cover. The end area of the other hermetically sealed portion projecting at least partially through and beyond an aperture in the front cover.

Reflector discharge lamp

A metal halide lamp in which no color shadowing occurs on the light acceptance surface and which at the same time emits with sufficient brightness is achieved according to the invention by encapsulating lutetium halide and one or more of the metal halides from groups A, B and C in an arc tube of a metal halide lamp together with a mercury halide:

Metal halide lamp with reduced color shadowing

A reflector used for a light source material of a liquid crystal video projector provides a good projection image and causes no color shading to occur in the periphery of a screen. The reflector has a surface on which a dielectric multifilm coating is deposited. The reflector reflects only visible light beams and has a wavelength .lambda..sub.1, which has a spectral transmittance on a short wave side (with normal incidence) of 20% and is equal to or smaller than 440 nm and, at the same time, has a wavelength .lambda..sub.2, which has a spectral transmittance on a long wave side (with normal incidence) of 50% and is equal to or greater than 820 nm.

Parabolic dielectric multilayer reflector

This invention provides an ophthalmological image processing system which can avoid data errors when processing images by appending data to identify a subject's left and right eyes, and other photographic condition data. The system comprises an ophthalmological camera for electronically obtaining an image of a subject's eyes, inputting means for inputting photographic condition data, and processing means for linking a fundus image obtained by the ophthalmological camera to the photographic condition data input by the inputting means.

Growing community of inventors

Hyogo, Japan

Yoshio Okazaki